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I have a basic system working with one client, seven dataservers, and a 
redirector.  The client can store correctly but I am observing a 
consistent five second delay when the client is storing data.

I ran xrdcp with -d 3 and the output contains :

071207 23:03:40 001 Xrd: DoLogin: No prev session info for 10.1.2.255:1094
071207 23:03:40 001 Xrd: Open: Access to server granted.
071207 23:03:40 001 Xrd: Open: Opening the remote file /xrd/test24/100mb
071207 23:03:40 001 Xrd: Open: File open in progress.
071207 23:03:40 18805 Xrd: XrdClientMessage::ReadRaw: Reading header (8 
bytes).
071207 23:03:40 18805 Xrd: ReadRaw: Reading from 10.1.2.255:1094
071207 23:03:40 18805 Xrd: SendGenCommand: Sending command Open
071207 23:03:40 18805 Xrd: WriteRaw: Writing 24 bytes to physical connection
071207 23:03:40 18805 Xrd: WriteRaw: Writing to substreamid 0
071207 23:03:40 18805 Xrd: WriteRaw: Writing 17 bytes to physical connection
071207 23:03:40 18805 Xrd: WriteRaw: Writing to substreamid 0
071207 23:03:40 18805 Xrd: ReadPartialAnswer: Reading a XrdClientMessage 
from the server [10.1.2.255:1094]...
071207 23:03:40 18805 Xrd: XrdClientMessage::ReadRaw:  sid: 1, IsAttn: 
0, substreamid: 0
071207 23:03:40 18805 Xrd: XrdClientMessage::ReadRaw: Reading data (4 
bytes) from substream 0
071207 23:03:40 18805 Xrd: ReadRaw: Reading from 10.1.2.255:1094
071207 23:03:40 18805 Xrd: BuildMessage:  posting id 1
071207 23:03:40 18805 Xrd: XrdClientMessage::ReadRaw: Reading header (8 
bytes).
071207 23:03:40 18805 Xrd: ReadRaw: Reading from 10.1.2.255:1094
071207 23:03:40 18805 Xrd: ReadPartialAnswer: Server [10.1.2.255:1094] 
answered [kXR_wait] (4005)
071207 23:03:40 18805 Xrd: CheckErrorStatus: Server [10.1.2.255:1094] 
requested 5 seconds of wait
071207 23:03:42 18805 Xrd: DumpPhyConn: Phyconn entry, 
[log in to unmask]:1094', LogCnt=1 Valid
071207 23:03:44 18805 Xrd: DumpPhyConn: Phyconn entry, 
[log in to unmask]:1094', LogCnt=1 Valid
071207 23:03:45 18805 Xrd: SendGenCommand: Sending command Open



It appears that the client received a 5 second delay from the 
redirector.  I don't seen any useful information in the olbd log of the 
redirector and the xrootd log only indicates that the client was asked 
to wait:

071207 22:54:24 15092 odc_send2Man: root.18805:16@compute-0-0 asked to 
wait 5 by xrdb path=/xrd/test24/100mb


How do I determine why the redirector is sending xXR_wait?

Is the result of my configuration defaulting to round robin scheduling?


Thanks,

Patrick